Iamancho,
speaking technical nothing from 1-3 will protect you about a backdoor, at least not until it was found (we can discuss every point more detailed if you want). So it's just a matter of trust....

If you need a 100% clean version, take the old original Xolox 1.12, install and then patch it yourself as Pataya described:
http://www.gnutellaforums.com/showth...&threadid=6145